in the world of technology, and here is a pure good news story. there is a company who this year came out with a robotic arm who attaches to the arms of those whoh have had strokes. they are paralyzed. it allows the brain to transmitd. nerve signals to the muscles in the arm and the robotic arm picks it up and allows the arm to move. this is the most extraordinary thing. we are able to do that sort of thing. another example is 3d printers which i think i can explain. you take liquid plastic. you design something like say a plastic pin. you pour the liquid plastic in and the 3d printer outputs an object. this could revolutionize manufacturing. it is just beginning to come out in productivity right now. these are the source of ideas that are based on the knowledge you produce in the united states. as we know knowledge since the industrial revolution has been what has drirch economies forward.nd and it is still possible in the united states.s >> we had visitors here, and i was struck by two, and what they describe as a world of moore's law where comp